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Daniel Kiefer

@danielkiefer

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Latest posts by Daniel Kiefer @danielkiefer

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No, really, pi is wrong: The Tau Manifesto For millennia, the circle has been considered the most perfect of shapes, and the circle constant π captured the geometry of the circle in a single number. But π is wrong, and it’s time to set things ...

Happy τ-day! :)
τ = 2π = 6.28…
#TauDay #τday #PiDay

www.tauday.com

28.06.2025 21:20 👍 2 🔁 0 💬 0 📌 0
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Happy Europe Day!

09.05.2025 06:16 👍 1968 🔁 450 💬 69 📌 62
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While the world retreats behind tariffs, denies the climate crisis, drills for yesterday’s fuels and gambles away the future of our children—Europe designs Starline.
A pan-European high-speed rail network that slashes CO₂ emissions by up to 90% compared to flights. Fast, clean, connected.

12.04.2025 15:47 👍 253 🔁 46 💬 15 📌 4
A stylised green outline of an electrical plug curves across the top. In the centre is the bold text "47%" in black, followed by the text "Electricity generated from renewables in the EU in 2024" in a smaller font below. In the lower-left corner are faint line drawings of a wind turbine and solar panels. The European Commission logo is in the top right corner. The background has a faint watermark pattern.

A stylised green outline of an electrical plug curves across the top. In the centre is the bold text "47%" in black, followed by the text "Electricity generated from renewables in the EU in 2024" in a smaller font below. In the lower-left corner are faint line drawings of a wind turbine and solar panels. The European Commission logo is in the top right corner. The background has a faint watermark pattern.

2024 was a record year for renewables.

Renewable generation reached 47% of the EU power mix, helping to bring down average wholesale electricity prices since 2021

Here are some key figures ↓

12.04.2025 07:43 👍 582 🔁 144 💬 15 📌 11
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Tariffs xkcd.com/3073

08.04.2025 00:03 👍 31372 🔁 8767 💬 258 📌 466
Biene auf einem blühenden Ast einer Rosaceae.

Biene auf einem blühenden Ast einer Rosaceae.

Frühling in Paris.

02.04.2025 18:33 👍 4 🔁 0 💬 0 📌 0

Do you love Rust, Typst, and Open Source? You may have found your dream job. Typst is looking for a Rust software engineer to work on the Typst compiler. Join us in Berlin or remotely anywhere from Germany or France. Learn more and apply: typst.app/jobs/

01.04.2025 16:21 👍 44 🔁 6 💬 4 📌 1